[ Ref. Dan Wilbanks in 211112 MMDigest ]

Dan, I'm fairly certain the PianoDisc floppy disk file system is
proprietary. I believe this was so folks couldn't make their own
copies of music discs, other than playing back what they play on
their piano.

Wish I had better news for you. Upgrading your system is possible,
but not inexpensive.

David Dewey